CN203643240U - Visual loading device for mechanics experiment of granular materials - Google Patents
Visual loading device for mechanics experiment of granular materials Download PDFInfo
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- CN203643240U CN203643240U CN201320740848.9U CN201320740848U CN203643240U CN 203643240 U CN203643240 U CN 203643240U CN 201320740848 U CN201320740848 U CN 201320740848U CN 203643240 U CN203643240 U CN 203643240U
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Abstract
The utility model discloses a visual loading device for a mechanics experiment of granular materials. The visual loading device comprises a visual framework, a compression load applying device, a shear load applying device, an upper visual granule sample box and a lower visual granule sample box, wherein the upper visual granule sample box and the lower visual granule sample box are respectively arranged in the visual framework, the lower visual granule sample box is mounted at the bottom of an inner cavity of the visual framework in a sliding manner and is applied with a shear load by the shear load applying device mounted on the visual framework, the upper visual granule sample box and the lower visual granule sample box are connected through detachable dowels, and the granular materials in the upper visual granule sample box can be applied with a compression load by the compression load applying device mounted on the visual framework. According to the visual loading device, the compression (axial) load, the shear load and the coupled compression (axial) and shear load can be applied to realize different loading paths and the corresponding inner stress variations of granules can be observed in real time at the different loading paths.
Description
Technical field
The utility model relates to particulate matter Resarch on A New Type and visual technical field, refers in particular to the visual charger of a kind of particulate material Experiments of Machanics.
Background technology
Ground class particulate matter ubiquity in nature, engineering construction and daily life, the research of its mechanical characteristic and dynamic response has been carried out decades in academia.In passing research, all generally that ground particulate matter is assumed to non-individual body analysis, based on classical elastic-plastic mechanics theory, people have been developed more Rock And Soil macromechanics model, but neither one energy is comprehensive, the constitutive equation of its strain-stress relation of correction.Tracing it to its cause, is mainly because the discontinuous particle characteristics of the hypothesis based on non-individual body and ground itself is not inconsistent, and therefore the thin sight research based on particle level has important learning value.
In mechanical analysis, mainly adopt the method for theoretical derivation, analog computation and experiment test.But in current particle mechanics study, theoretical analysis runs into very big difficulty, numerical simulation calculation because of particulate matter calculated amount large, can only simulate limited particle, granular system that shape is single, be difficult to effectively be applied in theoretical research and engineering practice.Therefore experiment test just seems particularly important, or perhaps present stage the most applicable means.
The method of particle mechanics experiment test is a lot, mainly contains high Accuracy Electronic Balance weight method, sensitive transfer paper indentation method, photoelastic experiment method, confocal microscope method and magnetic resonance elastography method develop the color.Professor Behringer of Duke university of the U.S. in 1999 applies photoelastic method and has done great many of experiments in particle mechanics research field, has delivered corresponding research paper; Tsing-Hua University also carried out the photoelastic experiment research of particle since 07 year, and on the basis of the photoelastic equipment of professor Behringer development, increase the equipment of the physical quantity such as power, displacement on can real-time follow-up macroscopic property, invented a kind of novel photoelastic experiment instrument.But above-mentioned two kinds of photoelastic instruments can only axially load, cannot carry out the photoelastic experiment under shear load effect, more can not carry out the photoelastic experiment of xial feed and shear load coupling, therefore development can be carried out charger that multiple Load Combination applies the application in particle mechanics has important value for photoelastic experiment.
In order to study the characteristic such as distortion, intensity of particulate material under various complex loading conditions, need development to meet the testing equipment of this requirement, the development of this equipment can meet this requirement.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of particulate material Experiments of Machanics visual charger, in photoelastic experiment process, the load that can compress in (axially) load, shear load and both coupling situations applies, and in conjunction with photo-elastic instrument, observe granule interior mechanical property under various load actions and change.
For achieving the above object, technical scheme provided by the utility model is: the visual charger of a kind of particulate material Experiments of Machanics, it comprises Visualization Framework, compression load bringing device, visual upper particle sample box and the visual lower particle sample box of shear load bringing device and pairing mutually, wherein, described visual upper particle sample box and visual lower particle sample box are placed in respectively in Visualization Framework, and described visual lower particle sample box is slidably mounted on the intracavity bottom of Visualization Framework, and can apply shear load to it by the shear load bringing device that is loaded on Visualization Framework sidewall, between described visual upper particle sample box and visual lower particle sample box, connect by dismountable pin, and described visual upper particle sample box can apply compression load to the particulate material in it by the compression load bringing device that is loaded on Visualization Framework top.
It also includes measurement display, on described compression load bringing device and shear load bringing device, tension-compression sensor and displacement transducer is all housed, and described tension-compression sensor is connected with described measurement display respectively with displacement transducer.
Described Visualization Framework is provided with the reset screw rod for adjusting particle sample box initial position.
The drain hole place of described visual upper particle sample box disposes the loading cover plate for pressing its endoparticle material, described compression load bringing device passes through its depression bar against described loading cover plate, for the particulate material in visual upper particle sample box applies compression load.
Described shear load bringing device is the sidewall against visual lower particle sample box by its shear rod, for this visual lower particle sample box applies shear load.
Described visual upper particle sample box and visual lower particle sample box are all supporting two blocks of visual plates, on described visual upper particle sample box and visual lower particle sample box, be formed with respectively the draw-in groove for visual plate described in plug-in mounting, and the draw-in groove of described visual upper particle sample box is corresponding one by one with the draw-in groove of visual lower particle sample box, after visual upper particle sample box and visual lower particle sample box are connected and fixed, the respective card slot up/down perforation of the draw-in groove of visual upper particle sample box and visual lower particle sample box; After two blocks of visual plates of described visual upper particle sample box and two blocks of visual plates of visual lower particle sample box are inserted on corresponding draw-in groove, be jointly formed with the accommodation space for accommodating particulate material.
On the intracavity bottom of described Visualization Framework, correspondence is provided with line slide rail, and described visual lower particle sample box is to be slidably mounted on described line slide rail by the slide block of its bottom.
Described visual plate is poly (methyl methacrylate) plate.
Being shaped as of described Visualization Framework is square.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
1, the utility model utilizes compression load bringing device and shear load bringing device to load, break through the limitation of counterweight, can in the range of regulation, apply the load of arbitrary size, and tension-compression sensor and displacement transducer have been installed, in real time accurate recording load, displacement size variation.
2, the utility model is divided into upper and lower box particle sample box, can apply shear load to particulate material, the existing instrument overcoming can only apply compression (axially) load, can not apply the restriction of shear load, make the load mode of test more diversified, expanded the range of application of particle test.
3, the utility model arranges multiple draw-in grooves in particle sample box, insert the sample box that can form different spacing after visual plate, on the one hand in the time carrying out two dimensional surface test, can weigh the impact of sample thickness size, on the other hand, can select different sample thickness sizes according to the conveniency of particulate material processing.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the front view of visual upper particle sample box of the present utility model.
Fig. 3 is the vertical view of visual upper particle sample box of the present utility model.
Fig. 4 is the stereographic map of visual lower particle sample box of the present utility model.
Fig. 5 is that the utility model applies shear load and makes the structural representation after visual lower particle sample box moves.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
Shown in Figure 1, the visual charger of particulate material Experiments of Machanics described in the present embodiment includes the Visualization Framework 1 that entirety is square, compression load bringing device 2, shear load bringing device 3, measure visual upper particle sample box 5 and the visual lower particle sample box 6 of display 4 and pairing mutually, wherein, described visual upper particle sample box 5 and visual lower particle sample box 6 are placed in respectively in Visualization Framework 1, and on the intracavity bottom of described Visualization Framework 1, correspondence is provided with line slide rail 11, described visual lower particle sample box 6 is to be slidably mounted on described line slide rail 11 by the slide block 8 of its bottom, friction factor can be by test determination, described visual lower particle sample box 6 is slidably mounted on the intracavity bottom of Visualization Framework 1 by the slide block 8 of its bottom, and can apply shear load to it by the shear load bringing device 3 being loaded on Visualization Framework 1 top, between described visual upper particle sample box 5 and visual lower particle sample box 6, connect by dismountable pin 10, and after connecting, form a complete particle sample box, described visual upper particle sample box 5 can apply compression (axially) load to the particulate material in it by the compression load bringing device 2 being loaded on Visualization Framework 1 sidewall, on described compression load bringing device 2 and shear load bringing device 3, tension-compression sensor and displacement transducer are all housed, and described tension-compression sensor is connected with measurement display 4 respectively by wire with displacement transducer, wherein displacement transducer adopts grating sensor, precision high (this charger displacement accuracy is 0.01mm), antijamming capability be strong, there is no artificial reading error, easy for installation, use reliable, the top of described visual upper particle sample box 5 is provided with the loading cover plate for pressing its endoparticle material, compression load bringing device 2 passes through its depression bar 201 against loading cover plate, for the particulate material in visual upper particle sample box 5 applies compression (axially) load, described shear load bringing device 3 is the sidewall against visual lower particle sample box 6 by its shear rod 301, for this visual lower particle sample box 6 applies shear load.In addition, on described Visualization Framework 1, be also provided with the reset screw rod 7 for adjusting particulate material sample box initial position.
Referring to shown in Fig. 2 to Fig. 4, visual upper particle sample box 5 described in the present embodiment and visual lower particle sample box 6 are all supporting two blocks of visual plates (being specially poly (methyl methacrylate) plate), simultaneously, on described visual upper particle sample box 5 and visual lower particle sample box 6, be formed with respectively the draw-in groove for described visual plate is installed, and the draw-in groove 501 of described visual upper particle sample box 5 is corresponding one by one with the draw-in groove 601 of visual lower particle sample box 6, so that after visual upper particle sample box 5 and visual lower particle sample box 6 be connected and fixed, the draw-in groove 501 of visual upper particle sample box 5 and respective card slot 601 up/down perforations of visual lower particle sample box 6, after two blocks of visual plates 602,603 of two blocks of visual plates 502,503 of described visual upper particle sample box 5 and visual lower particle sample box 6 are inserted on corresponding draw-in groove, be jointly formed with the accommodation space for accommodating particulate material.
Be below the concrete operations principle of compress/shear test of the visual charger of the above-mentioned particulate material Experiments of Machanics of the present embodiment: when work, first the particle sample box being combined by visual upper particle sample box 5 and visual lower particle sample box 6 is pulled down, two blocks of visual plates 602,603 of described visual lower particle sample box 6 can be put into any two draw-in grooves 601, form the sample box of different size, draw-in groove spacing has 5mm, 10mm, 15mm, tetra-kinds of selections of 20mm conventionally, then two of described visual upper particle sample box 5 blocks of visual plates 502,503 are put into respectively two draw-in grooves 501 corresponding with above-mentioned two draw-in grooves 601 of visual lower particle sample box 6, so that the space of visual upper particle sample box 5 and visual lower particle sample box 6 connects, in addition, in order to reduce the friction of visual upper particle sample box 5 and visual lower particle sample box 6, the contact position of particle sample box 5 and visual lower particle sample box 6 is coated with the lubricants such as a small amount of vaseline on visual sometimes, with pin 10, visual upper particle sample box 5 and visual lower particle sample box 6 are connected and fixed again afterwards, form a complete particle sample box, put into afterwards the particulate material of corresponding length according to Selected Card separation top drain hole of particle sample box 5 from visual, particles used material is the millimetre-sized photoelastic cylinder of diameter in the present embodiment, a large amount of small columns are put into particle sample box with elongated tweezers, the process of putting into, the end face of guarantee small column and bottom surface are near visual wooden partition face, when filling up after particulate material sample box, the loading cover plate 9 of corresponding size is covered on particulate material top, again particulate material sample box complete above-mentioned filling is put back in Visualization Framework 1 afterwards, rotate afterwards reset screw rod 7 and adjust the initial position of particle sample box, again particle sample box is resetted, the depression bar 201 of rotary compression load bringing device 2 is against on loading cover plate 9 depression bar termination, and the shear rod 301 of rotating shear load bringing device 3 is against on the sidewall of visual lower particle sample box 6 shear rod termination, again whole charger is placed on afterwards to the centre of photo-elastic instrument, open light source and measure display 4, light is propagated along polarizer, quarter wave plate, visual charger, quarter wave plate, analyzer, video camera, the collection image that video camera is adopted directly shows on computers in real time, pull out afterwards pin 10, adjust position after the best, power, the displacement data measured on display 4 are made zero, after above-mentioned all working completes, can apply compression (axially) load and shear load to the particulate material in particle sample box by the depression bar 201 of rotary compression load bringing device 2 and the shear rod 301 of shear load bringing device 3, specifically as shown in Figure 5, in the process loading, can observe intuitively the size variation of contact stress in particulate material, the forming process of shear zone, the distribution of riding chain and trend, measure display 4 simultaneously and can record all compressions (axially) load-compressions (axially) displacement data and shear load-shear displacemant data.
In addition, this visual charger can also be simulated various common soil mechanical tests, as compression, shearing, stress arch, the test such as ground load just or under flexible foundation, to realize different load paths, and corresponding granule interior STRESS VARIATION under real-time monitored different loading paths, meet various requirement of experiment.
The examples of implementation of the above are only the preferred embodiment of the utility model, not limit practical range of the present utility model with this, therefore the variation that all shapes according to the utility model, principle are done all should be encompassed in protection domain of the present utility model.
Claims (9)
1. the visual charger of particulate material Experiments of Machanics, it is characterized in that: it comprises Visualization Framework (1), compression load bringing device (2), visual upper particle sample box (5) and the visual lower particle sample box (6) of shear load bringing device (3) and pairing mutually, wherein, described visual upper particle sample box (5) and visual lower particle sample box (6) are placed in respectively in Visualization Framework (1), and described visual lower particle sample box (6) is slidably mounted on the intracavity bottom of Visualization Framework (1), and can apply shear load to it by the shear load bringing device (3) that is loaded on Visualization Framework (1) sidewall, between described visual upper particle sample box (5) and visual lower particle sample box (6), connect by dismountable pin (10), and described visual upper particle sample box (5) can apply compression load to the particulate material in it by the compression load bringing device (2) that is loaded on Visualization Framework (1) top.
2. the visual charger of a kind of particulate material Experiments of Machanics according to claim 1, it is characterized in that: it also includes measures display (4), on described compression load bringing device (2) and shear load bringing device (3), tension-compression sensor and displacement transducer are all housed, and described tension-compression sensor is connected with described measurement display (4) respectively with displacement transducer.
3. the visual charger of a kind of particulate material Experiments of Machanics according to claim 1, is characterized in that: described Visualization Framework (1) is provided with the reset screw rod (7) for adjusting particle sample box initial position.
4. the visual charger of a kind of particulate material Experiments of Machanics according to claim 1, it is characterized in that: the drain hole place of described visual upper particle sample box (5) disposes the loading cover plate (9) for pressing its endoparticle material, described compression load bringing device (2) is by its depression bar (201) against described loading cover plate (9), and the particulate material interior for visual upper particle sample box (5) applies compression load.
5. the visual charger of a kind of particulate material Experiments of Machanics according to claim 1, it is characterized in that: described shear load bringing device (3) is the sidewall against visual lower particle sample box (6) by its shear rod (301), for this visual lower particle sample box (6) applies shear load.
6. the visual charger of a kind of particulate material Experiments of Machanics according to claim 1, it is characterized in that: described visual upper particle sample box (5) and visual lower particle sample box (6) are all supporting two blocks of visual plates, on described visual upper particle sample box (5) and visual lower particle sample box (6), be formed with respectively the draw-in groove for visual plate described in plug-in mounting, and the draw-in groove (501) of described visual upper particle sample box (5) is corresponding one by one with the draw-in groove (601) of visual lower particle sample box (6), after visual upper particle sample box (5) and visual lower particle sample box (6) are connected and fixed, respective card slot (601) up/down perforation of the draw-in groove (501) of visual upper particle sample box (5) and visual lower particle sample box (6), after two blocks of visual plates (502,503) of described visual upper particle sample box (5) and two blocks of visual plates (602,603) of visual lower particle sample box (6) are inserted on corresponding draw-in groove, be jointly formed with the accommodation space for accommodating particulate material.
7. the visual charger of a kind of particulate material Experiments of Machanics according to claim 1, it is characterized in that: on the intracavity bottom of described Visualization Framework (1), correspondence is provided with line slide rail (11), described visual lower particle sample box (6) is to be slidably mounted on described line slide rail (11) by the slide block (8) of its bottom.
8. the visual charger of a kind of particulate material Experiments of Machanics according to claim 6, is characterized in that: described visual plate is poly (methyl methacrylate) plate.
9. the visual charger of a kind of particulate material Experiments of Machanics according to claim 1, is characterized in that: being shaped as of described Visualization Framework (1) is square.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320740848.9U CN203643240U (en) | 2013-11-21 | 2013-11-21 | Visual loading device for mechanics experiment of granular materials |
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| CN201320740848.9U CN203643240U (en) | 2013-11-21 | 2013-11-21 | Visual loading device for mechanics experiment of granular materials |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316458A (en) * | 2014-10-28 | 2015-01-28 | 中山大学 | Novel testing method for friction coefficient of circular disc shaped photoelastic particles |
| CN105203418A (en) * | 2015-10-15 | 2015-12-30 | 郑州轻工业学院 | pneumatic grain hardness detector |
| CN106198258A (en) * | 2016-08-11 | 2016-12-07 | 绍兴文理学院 | Rock Anti cuts off Size Effect of Strength testing machine |
| CN106442311A (en) * | 2016-11-30 | 2017-02-22 | 燕山大学 | Shear friction test device for pressure-bearing granular medium under vibration condition |
| CN108398322A (en) * | 2018-01-30 | 2018-08-14 | 南京理工大学 | The contact force measurement experiment device and its experimental method of granular materials pressurization experiment |
| CN109668517A (en) * | 2018-11-23 | 2019-04-23 | 河海大学 | Electromagnetic impact lower sphere granular system arbitrary point normal strain measuring device and method |
| CN110907621A (en) * | 2019-10-24 | 2020-03-24 | 广东工业大学 | Visual foundation load experimental apparatus |
| CN111157443A (en) * | 2020-01-10 | 2020-05-15 | 清华大学 | Vibration measurement method and device for high-frequency friction force of rock interface |
| CN112924302A (en) * | 2021-01-27 | 2021-06-08 | 北京科技大学 | Image recognition-based discrete shear characteristic evolution rule research method |
| CN114088587A (en) * | 2021-11-19 | 2022-02-25 | 华东交通大学 | Boundless particle torsional shear loading hollow cylinder photoelastic experiment device and using method thereof |
| CN117969295A (en) * | 2024-04-02 | 2024-05-03 | 广州大学 | Parameter visualization soil load experimental device |
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- 2013-11-21 CN CN201320740848.9U patent/CN203643240U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316458A (en) * | 2014-10-28 | 2015-01-28 | 中山大学 | Novel testing method for friction coefficient of circular disc shaped photoelastic particles |
| CN105203418A (en) * | 2015-10-15 | 2015-12-30 | 郑州轻工业学院 | pneumatic grain hardness detector |
| CN106198258B (en) * | 2016-08-11 | 2023-10-27 | 绍兴文理学院 | Rock shear strength size effect testing machine |
| CN106198258A (en) * | 2016-08-11 | 2016-12-07 | 绍兴文理学院 | Rock Anti cuts off Size Effect of Strength testing machine |
| CN106442311A (en) * | 2016-11-30 | 2017-02-22 | 燕山大学 | Shear friction test device for pressure-bearing granular medium under vibration condition |
| CN108398322A (en) * | 2018-01-30 | 2018-08-14 | 南京理工大学 | The contact force measurement experiment device and its experimental method of granular materials pressurization experiment |
| CN109668517A (en) * | 2018-11-23 | 2019-04-23 | 河海大学 | Electromagnetic impact lower sphere granular system arbitrary point normal strain measuring device and method |
| CN110907621A (en) * | 2019-10-24 | 2020-03-24 | 广东工业大学 | Visual foundation load experimental apparatus |
| CN111157443B (en) * | 2020-01-10 | 2021-11-02 | 清华大学 | Vibration measurement method and device for high-frequency friction force of rock interface |
| CN111157443A (en) * | 2020-01-10 | 2020-05-15 | 清华大学 | Vibration measurement method and device for high-frequency friction force of rock interface |
| CN112924302A (en) * | 2021-01-27 | 2021-06-08 | 北京科技大学 | Image recognition-based discrete shear characteristic evolution rule research method |
| CN114088587A (en) * | 2021-11-19 | 2022-02-25 | 华东交通大学 | Boundless particle torsional shear loading hollow cylinder photoelastic experiment device and using method thereof |
| CN117969295A (en) * | 2024-04-02 | 2024-05-03 | 广州大学 | Parameter visualization soil load experimental device |
| CN117969295B (en) * | 2024-04-02 | 2024-05-31 | 广州大学 | Parameter visualization soil load experimental device |
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